<template>
<div>
    <p>row</p>
    <div class="row">
        <div class="item"></div>
        <div class="item"></div>
        <div class="item"></div>
    </div>

    <p>column</p>
    <div class="column">
        <div class="item"></div>
        <div class="item"></div>
        <div class="item"></div>
    </div>
</div>
</template>
<style>
.row{
    display:flex;
    flex-direction: row;
}
.column{
    display:flex;
    flex-direction: column;
}
.item{
    background: red;
    height: 100px;
    width: 100px;
    border:1px solid #000;
}
</style>
</html>